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i <br /> 1 <br /> t groundwater monitoring reports for the adjacent Tri-Valley Growers site (on file at the <br /> SJLHD offices). ✓ <br /> • Construct a monitoring well in each of the three deep borings. <br /> # Develop, purge and sample the monitoring wells. Development and purge water will <br /> be stored in 55-gallon drums at a location specified by the client. <br /> ' Submit three soil samples from each boring for laboratory analyses for TPH-G and <br /> BTEX. <br /> • Analyze three water samples for TPH-G and BTEX. <br /> Perform a survey to establish vertical and horizontal control for well-heads. <br /> 4.3 Site investigation Report <br /> Prepare a report describing the findings, conclusions, and recommendations. The report will <br /> be developed in accordance with requirements as outlined in Appendix A of the Tri-Regional <br /> Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground <br /> Tank Sites. <br /> 5.0 ANALYTICAL CHEMISTRY <br /> r <br /> Chemical analyses will be conducted by a State-certified Laboratory. Soil samples selected <br /> for testing will be analyzed for TPH-G and BTEX. TPH-G analyses will be conducted using <br /> y EPA Method 8015 modified. BTEX analyses will be conducted according to EPA Methods <br /> 8020 (extraction by purge & trap method 5030) for soil. Detection limits for BTEX analysis <br /> of soil will be 0.005 ppm. Detection Iimits for TPH-G analyses will be 1.0 ppm. <br /> Groundwater samples will also be analyzed for TPH-G and BTEX. TPH-G analyses will be <br /> conducted using EPA Method 8015 modified. BTEX analyses will be conducted according to <br /> r EPA Method 602. <br /> 6.0 HEALTH & SAFETY <br /> Site Health and Safety should be addressed in detail in a Site Specific Health & Safety Plan <br /> prepared for the project. The health and safety plan should be submitted to the SJLHD for ' <br /> review prior to field activity. <br /> -000-4 <br /> i <br /> y A i <br /> I Woftim-074WWB-Mey.1-5 <br /> Vi &Associates <br />